Battery pack, and ess and vehicle including the battery pack

Abstract

A battery pack includes a module assembly including a plurality of battery modules each including, on a side, a module opening through which venting gas is discharged, a pack cover facing the module opening and configured to cover the side of the module assembly, and an oxygen introduction preventing member located in a space formed between the module assembly and the pack cover and configured to prevent oxygen from being reversely introduced after venting gas is discharged in an extension direction of the space.

1 . A battery pack comprising:
 a module assembly comprising a plurality of battery modules, each battery module of the plurality of battery modules comprising a module opening on at least one side through which venting gas is discharged;   a pack cover facing the module opening and configured to cover a side of the module assembly; and   at least one oxygen introduction preventing member located in a space formed between the module assembly and the pack cover and configured to prevent oxygen from being introduced after venting gas is discharged from the module assembly.   
     
     
         2 . The battery pack according to  claim 1 , further comprising a pack opening provided at one end of the space. 
     
     
         3 . The battery pack according to  claim 1 , wherein the at least one oxygen introduction preventing member is a plurality of oxygen introduction preventing members, and
 wherein the plurality of oxygen introduction preventing members are spaced apart from each other in an extension direction of the space.   
     
     
         4 . The battery pack according to  claim 1 , wherein the at least one oxygen introduction preventing member is located between a pair of battery modules of the plurality of battery modules. 
     
     
         5 . The battery pack according to  claim 1 , wherein the space comprises a plurality of partition spaces divided by the at least one oxygen introduction preventing member, and
 wherein the at least one oxygen introduction preventing member is configured to open and close to allow or block flow of a fluid between the plurality of partition spaces.   
     
     
         6 . The battery pack according to  claim 5 , wherein the at least one oxygen introduction preventing member is configured to be opened when pressure of a fluid flowing in an extension direction of the space is equal to or higher than reference pressure. 
     
     
         7 . The battery pack according to  claim 5 , wherein the at least one oxygen introduction preventing member is a door configured to be rotatable. 
     
     
         8 . The battery pack according to  claim 5 , wherein the at least one oxygen introduction preventing member is a valve having a partially cut structure to be opened and closed. 
     
     
         9 . The battery pack according to  claim 5 , wherein the at least one oxygen introduction preventing member is configured to be opened in only one direction. 
     
     
         10 . The battery pack according to  claim 1 , wherein the module opening comprises a first module opening provided on a first side of each battery module and a second module opening provided on a second side of each module assembly. 
     
     
         11 . The battery pack according to  claim 10 , wherein the pack cover comprises a first pack cover provided on the first side of the module assembly and a second pack cover provided on the second side of the module assembly. 
     
     
         12 . The battery pack according to  claim 11 , further comprising:
 a first pack opening formed at a first end of a space formed between the first pack cover and the module assembly; and   a second pack opening formed at a second end of a space formed between the second pack cover and the module assembly.   
     
     
         13 . The battery pack according to  claim 11 , wherein the at least one oxygen introduction preventing member comprises a first oxygen introduction preventing member located in a first space formed between the first pack cover and the module assembly and a second oxygen introduction preventing member located in a second space formed between the second pack cover and the module assembly. 
     
     
         14 . An energy storage system (ESS) comprising the battery pack according to  claim 1 . 
     
     
         15 . A vehicle comprising the battery pack according to  claim 1 . 
     
     
         16 . The battery pack according to  claim 11 , wherein the at least one oxygen introduction preventing member comprises at least one first oxygen introduction preventing member extending from the battery module to the first pack cover and at least one second oxygen introduction preventing member extending from the battery module to the second pack cover. 
     
     
         17 . The battery pack according to  claim 16 , wherein the first pack cover has an inlet and the at least one first oxygen introduction preventing member rotates in only one direction from an original position to allow flow from the inlet toward the module assembly, and
 wherein the second pack cover has an outlet and the at least one second oxygen introduction preventing member rotates in only one direction from an original position to allow flow from the module assembly toward the outlet.   
     
     
         18 . The battery pack according to  claim 1 , wherein the at least one oxygen introduction preventing member comprises a first panel extending between two battery modules of the plurality of battery modules and a second panel hingedly connected to the first panel.